7993999 has 8 divisors (see below), whose sum is σ = 8668800. Its totient is φ = 7327776.

The previous prime is 7993987. The next prime is 7994017. The reversal of 7993999 is 9993997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7993999 - 2⁵ = 7993967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7993099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127 + ... + 4000.

It is an arithmetic number, because the mean of its divisors is an integer number (1083600).

Almost surely, 2^7993999 is an apocalyptic number.

7993999 is a deficient number, since it is larger than the sum of its proper divisors (674801).

7993999 is a wasteful number, since it uses less digits than its factorization.

7993999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289.

The product of its digits is 1240029, while the sum is 55.

The square root of 7993999 is about 2827.3660887830. The cubic root of 7993999 is about 199.9499791573.

The spelling of 7993999 in words is "seven million, nine hundred ninety-three thousand, nine hundred ninety-nine".